Iolite is a blue silicate mineral that occurs as crystals or grains in igneous rocks, Origin of name: from the Greek ios, which means violet. Iolite changes colours (pleochism) depending upon which angle it is viewed from and the gems are cut to take advantage of that. It is found in Sri Lanka, Burma, Australia's Northern Territory, Namibia, Brazil, Tanzania, Madagascar, Connecticut, and the Yellowknife area of the Northwest Territories of Canada.
Colour: Transparent, violet-blue, light blue, blue, rich blue-violet stone
Hardness 7.5
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